mercredi 24 octobre 2012

Chrysocolla is an attractive gem

By Joe Wilhelm


Chrysocolla is probably one of the most stunning gems found in jewelries and considered as a valuable ornament these days. Due to its infamous deep bluish green colour, it is thought of as an attractive find in the world of minerals and fossils. Though enjoyable to the eye, most people know little about Chrysocolla and its origins. Regularly confused as Turquoise, it is a silicate mineral usually formed through the oxidization of copper ores. Its specific and delightful blue, blue-green and green color with streaks of white to blue green makes it a favorite decorative stone typically utilised in jewelries. The name Chrysocolla was first coined in 315 BCE by Theophrastus, a Greek philosopher and student of Aristotle. The term Chrysocolla is the blend of 2 Greek words â€" chrysos meaning gold and kola meaning glue.

Chrysocolla is mostly connected with other secondary copper mineral. It can have the appearance of turquoise but even mor colourful . Nonetheless Chrysocolla can be hard for artist to work with and it has a hardness of 2.5 3.5 out of 10 on Moh's scale. It is considered valuable due to its interesting color.

Since it's a secondary copper mineral and often found in copper oxidization zones, it replaces other secondary minerals like quartz, malachite, limonite, cuprite and azurite. Given this nature, the determination of this silicate mineral is crisp and appears clear to opaque. Although it is considered as a minor ore of copper, it is also one of the commonest precious stones used as an ornament nowadays. Aside from its infamous lush blue-green color, it may also form in blackish blue and brown colors, although the blue green colour is still to be highly popular. Chrysocolla can be considered as among the most interesting gems in the world of mineral and fossils due to its glassy appearance which makes it a fitting ornament stone.

Over the years, scientist struggled to find out the genuine composition of Chrysocolla. However , a study conducted in 2006 provided proofs that Chrysocolla's composition contains a copper hydroxide mineral called spertiniite, chalcedony a mineral silica made up of quartz and moganite, amorphous silica or commonly known as opal, and of course, water.

Since it forms in regions with high copper oxidization, it can be found in states or locations with copper deposits. In Europe, Cornwall, England is noted to have high occurrence of Chrysocolla formation. In South America, Chile is a notable source location and in Africa, it can be discovered in the Democratic Republic of Congo. In the USA, multiple states were identified to have heavy occurrence of Chrysocolla formation. These states are Pennsylvania, Utah, New Mexico and the most notable source location in the US is Arizona.

Since the formation and composition of Chrysocolla itself is a wonder in the mineral and precious stone world, unless you'd purchase Chrysocolla jewelry, this is a gemstone that may not come along your way every day.




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